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David Shiffman, Ph.D. 🦈

@whysharksmatter.bsky.social
173K followers 1.6K following 117K posts

I am a marine conservation biologist studying sharks and a science writer. Posts are about science and the environment, science communication, and more! He/him

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David Shiffman, Ph.D. 🦈 @whysharksmatter.bsky.social · 13m
The allyship training I received stressed the power of saying something as simple as “dude, not cool”
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David Shiffman, Ph.D. 🦈 @whysharksmatter.bsky.social · 28m
Why did none of You People tell me that American Airlines now has new in-flight snacks options?!?
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John Timmer @jtimmer.bsky.social · 9h
In the two fields I've been in—academics and journalism—we have a surplus of excellent people who have not engaged in antisocial behavior but are struggling to find jobs. I don't understand why so many people feel they should take a back seat behind people who have.
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Janet D. Stemwedel @docfreeride.bsky.social · 10h
People who are truly contrite about the harm they did via harassment, assault, etc., usually understand that they do not get to keep their positions of power or their good name.
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Skype a Scientist @skypeascientist.bsky.social · 9h
We at Skype a Scientist are deeply troubled by the closure of the Academy of Natural Sciences. We urge you to contact Drexel University Leadership and Academy interim leader Trish Wellenbach to urge them to reopen the museum. President Merlo president@Drexel.edu Trish Wellenbach tw958@drexel.edu
a block of text with a statement that reads We at Skype a Scientist are deeply alarmed by the decision of Drexel University leadership and the Academy of Natural Sciences Board to close the Academy’s public museum.

Skype a Scientist is based in Philadelphia with deep roots in our city. Making science accessible, in particular for Philly’s children, is a top priority for our organization. We operate in community centers, at street festivals, and at the intersection of science and art. For the last 10 years, we have worked to engage a broader coalition of Philly residents to care for our local biodiversity. 

Our program does not exist in a vacuum. The work that we do, alongside environmental education centers, our museums, classroom teachers, and more, create an ecosystem of connections with science. The loss of any part of this fragile ecosystem is detrimental. The Academy of Natural Sciences grounds biodiversity education in Philadelphia. With grand fossil halls, historical connections, and engaging exhibits, it is a place where many Philadelphians develop a love of science. Loss of access to this space cannot be tolerated.

We are living through an erosion of public education, particularly in the life sciences. Philadelphia cannot afford to lose our flagship biodiversity museum.

We call on the leaders of Drexel University and the Academy board to reverse their decision to close the Academy’s public museum. The children of Philadelphia and future generations of Philly-made scientists are counting on you.
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Sarah McAnulty, Ph.D. @sarahmackattack.bsky.social · 12h
If you are part of an academic society or a professor of any kind, public statements that you do not condone Drexel cutting off the academy of natural sciences from the public of Philadelphia is very important right now. We need your voices. Urgently.
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Prof Helen Bostock @oceanhelen.bsky.social · 13h
We are looking for a graduate director (level C - senior lecturer) for our new centre of excellence “our future oceans” 🌊 the role will involve working with me to run training and mentoring for phd and Early career tesearchers in the centre. But also opportunities to do research on ocean science.
jobs.unsw.edu.au
Jobs - Recent Jobs
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David Shiffman, Ph.D. 🦈 @whysharksmatter.bsky.social · 14h
Headed to Miami for some shark field research! Tomorrow I’m taking the natural history society of Maryland, and next week I have 2 3-day courses.
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Dave Levitan @davelevitan.bsky.social · 14h
AI evangelists might do better at converting skeptical people if every bit of news out of the small handful of companies doing all of it doesn't make the people in charge seem like absolute lunatics
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David Shiffman, Ph.D. 🦈 @whysharksmatter.bsky.social · 15h
Roses are red, They’re turning the frogs gay,
bbc.com
Invasive demon shrimp discovered in Wiltshire waterway
The "highly invasive" shrimp are larger than native species and can damage ecosystems.
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Don Moynihan @donmoyn.bsky.social · 15h
Unless Congress reclaims its power, this will just become the new normal. A good first step would be to impeach Vought. www.nytimes.com/2026/10/02/u...
nytimes.com
National Science Foundation Diverted $1.4 Billion in Science Funds Mandated by Congress
The move, affecting about one-fifth of the National Science Foundation’s primary research budget, is the latest sign of how the White House is asserting more control over grants.
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Mark Copelovitch @mcopelov.bsky.social · 15h
Folks look at you like you're crazy when you say we're in the midst of the worst, most unprecedented Article I constitutional crisis in American history, & then it's Friday.
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Yashar Ali 🐘 @yasharali.bsky.social · 30/09/2026
If you live in Florida — or anywhere for that matter — you should take a look at this data linked below which shows how the sugar industry is not paying its fair share to clean up the Everglades. Outrageous. Data Here: bit.ly/4xDIogh
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David Shiffman, Ph.D. 🦈 @whysharksmatter.bsky.social · 15h
Scientists spend another summer tagging sharks in Boston Harbor www.wbur.org/news/2026/09...
wbur.org
Scientists spend another summer tagging sharks in Boston Harbor
Boston Harbor has become a hot destination, and not only for humans. Scientists with the New England Aquarium have tracked sharks for years now. WBUR’s Amanda Beland went along on a trip to learn…
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Dan Garisto @dangaristo.bsky.social · 15h
Good end-of-FY coverage by the Times. The amount of unspent funds has wiggled but it was pretty clear for some time now that NSF was simply not going to spend a substantial portion of its congressional appropriation this year.
nytimes.com
National Science Foundation Diverted $1.4 Billion in Science Funds Mandated by Congress
The move, affecting about one-fifth of the National Science Foundation’s primary research budget, is the latest sign of how the White House is asserting more control over grants.
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Ray C. Schmidt, PhD @afrfreshh2o.bsky.social · 15h
Many thanks again for @whysharksmatter.bsky.social public seminar last night and his talk to our senior capstone course today at Randolph-Macon College. Very informative and engaging talks!
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Wil Sterling @shadowvasterra.bsky.social · 15h
You’re telling me an invasive demon shrimp fried this rice? Cause that would explain the nails and glass in there.
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Silver♦️Red Druid @silvergauntlets.bsky.social · 15h
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Veleda_k @veleda-k.bsky.social · 16h
Not now, invasive demon shrimp.
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HWrites @hwrites.bsky.social · 16h
I knew it was bad out there, but not "invasive demon shrimp" bad.
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David Shiffman, Ph.D. 🦈 @whysharksmatter.bsky.social · 16h
Invasive demon shrimp discovered in waterway www.bbc.com/news/article... 🦑 🧪 🌍️
bbc.com
Invasive demon shrimp discovered in Wiltshire waterway
The "highly invasive" shrimp are larger than native species and can damage ecosystems.
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David Shiffman, Ph.D. 🦈 @whysharksmatter.bsky.social · 18h
Agency says sea turtle eggs laid on California beaches are a first for the US West Coast apnews.com/article/cali...
apnews.com
https://apnews.com/article/california-beaches-turtle-nests-0307faf01122e14f85c0973678c1588e
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David Shiffman, Ph.D. 🦈 @whysharksmatter.bsky.social · 18h
DNA barcoding and mitochondrial diversity of threatened sharks and rays from the northern Arabian Sea link.springer.com/article/10.1...
link.springer.com
DNA barcoding and mitochondrial diversity of threatened sharks and rays from the northern Arabian Sea - Marine Biodiversity
Elasmobranchii, including sharks, rays, and skates, face increasing threats from overfishing and habitat degradation, particularly in regions with limited monitoring and management. The present study…
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Maija @maijasauna.bsky.social · 20h
I live in a landlocked town and it is something even my local library system is very interested in.
Your request for Why Sustainable Seafood Matters has been approved.
Title: Why Sustainable Seafood Matters
Author: David Shiffman
Format: Book - Non-Fiction
ISBN: 9781421455730
Audience: Adult

Notes:

Thank you for your interest in the Calgary Public Library collection. We will add your suggestion to our collection. When it appears in the library catalogue you will be able to place a hold. We also invite you to explore our Digital Library from home for free access to eBooks, audiobooks, movies, music, online learning, and many other resources.
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David Shiffman, Ph.D. 🦈 @whysharksmatter.bsky.social · 20h
Today I’m giving a seminar about my research at Randolph-Macon, and then meeting with some students and faculty. Yes, I’m available to give a research seminar at your institution!
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that fucking cat you hate @kaithekat.bsky.social · 21h
I live in a beach town so this seems like something my county library system would be very interested in
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Diane Shaw @museocat.bsky.social · 21h
Once or twice I’ve actually gone to the manufacturer’s website to get information about shower controls. I’ve had the same thought as you, David.
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wombatarama.bsky.social @wombatarama.bsky.social · 21h
someone is so mad about hotel bathroom doors that they made a website about it! bringbackdoors.com
bringbackdoors.com
Bring Back Doors
Bring Bathroom Doors Back to Hotels
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David Shiffman, Ph.D. 🦈 @whysharksmatter.bsky.social · 21h
The Ocean Cleanup, launched via a splashy TED talk, promised to remove all the plastic from the ocean. It failed for exactly the reasons that scientists, dismissed as “jealous haters” at the time, said it would fail. What can we learn from this? therevelator.org/why-ocean-cl...
therevelator.org
Why The Ocean Cleanup Hasn’t Solved the Plastic Pollution Crisis • The Revelator
Global problems are rarely solved by one person or invention. The Ocean Cleanup didn’t work, for the reasons experts said it wouldn’t. What can we learn from this?
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David Shiffman, Ph.D. 🦈 @whysharksmatter.bsky.social · 15/07/2026
I talk a lot about the complexity of ocean conservation, and how real solutions can’t fit on a bumper sticker. Enter the Ocean Cleanup. Launched by a teenager giving a TED Talk, they claimed they were going to scoop all the plastic out of the ocean. 🧪🦑🌎
therevelator.org
Why The Ocean Cleanup Hasn’t Solved the Plastic Pollution Crisis • The Revelator
Global problems are rarely solved by one person or invention. The Ocean Cleanup didn’t work, for the reasons experts said it wouldn’t. What can we learn from this?
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David Shiffman, Ph.D. 🦈 @whysharksmatter.bsky.social · 17/08/2026
My latest article for the Revelator is about an emerging ocean conservation nightmare that the experts I spoke to compared to the early days of the shark fin trade. We have a chance to nip it in the bud. Please read and share! therevelator.org/fish-maw-con... @therevelator.org 🧪🌍🦑🐟
therevelator.org
Fish Maw: An Emerging Ocean Conservation Nightmare • The Revelator
Like the early days of the shark fin trade, the mostly unregulated market for dried fish swim bladders has exploded in popularity, devastating species around the world.
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David Shiffman, Ph.D. 🦈 @whysharksmatter.bsky.social · 03/09/2026
I wrote a report for the Convention on Migratory Species about the environmental impacts of fish aggregating devices in the Mediterranean Sea, gaps in current management regimes, and suggested regulatory improvements. Here are some of the key takeaways: 🧪🌍🦑🐟
southernfriedscience.com
Key takeaways from my Convention on Migratory Species report on fish aggregating devices in the Mediterranean Sea
The United Nations Environment Programme hired me to produce a Convengtion on Migratory Species report on the environmental impacts associated with fish aggregating devices and how to mitigate thos…
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David Shiffman, Ph.D. 🦈 @whysharksmatter.bsky.social · 08/09/2026
Start of semester reminder: I do not have a lab and cannot take graduate students. But I can serve on your thesis committee. If you’d like to work with me, here’s what I expect from you, and what you can expect from me. 🦑🌎🧪
southernfriedscience.com
I can serve on your graduate thesis committee. Here’s what you can expect of me, and what I expect in return.
By outlining my role and expectations as a committee member, my goal is to help make sure that we have a productive professional relationship, and that we avoid any conflict stemming from not being…
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David Shiffman, Ph.D. 🦈 @whysharksmatter.bsky.social · 22/09/2026
My latest for @therevelator.org is all about the important shark and ray areas project, a global-scale collaboration that has identified over 1,000 places significant for migration, reproduction, and more. 🧪🌎🦑🦈 To Save Sharks and Rays, Protect These Places therevelator.org/save-sharks-...
therevelator.org
To Save Sharks and Rays, Protect These Places • The Revelator
The Important Shark and Ray Areas project has identified thousands of critical habitats for some of the world’s most threatened fishes. Now saving these sites is up to us.
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David Shiffman, Ph.D. 🦈 @whysharksmatter.bsky.social · 23/09/2026
Yesterday I led a professional development workshop focusing on how to write and publish a scientific paper for the European Elasmobranch Association. Yes, I’m available to lead a professional development workshop for your university, agency, non-profit, or professional society!
Screenshot of a zoom call after the workshop featuring students from at least 5 countries
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David Shiffman, Ph.D. 🦈 @whysharksmatter.bsky.social · 22/09/2026
Friends and colleagues, I am desigining an online open-enrollment introduction to marine biology course. I have some fun activities planned with online datasets, webcams, research tools, and more. But what are your favorite online marine biology resources? 🧪🌍🦑🐟
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David Shiffman, Ph.D. 🦈 @whysharksmatter.bsky.social · 28/09/2026
Want to help out your author friend without spending a dime of your own money? Request that your local library order a copy of my upcoming book Why Sustainable Seafood Matters!
Canva graphic showing my book Why Sustainable Seafood Matters
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David Shiffman, Ph.D. 🦈 @whysharksmatter.bsky.social · 01/10/2026
Friends, I’m now on Cameo where I’m happy to record a message featuring a fun shark fact! Book in the next few days and I’ll record my message from deck of a shark research vessel in Florida! www.cameo.com/whysharksmat...
Cameo ad
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David Shiffman, Ph.D. 🦈 @whysharksmatter.bsky.social · 22h
It’s o-fish-ial, Maryland is now the first US state with an official state shark. I wrote about megalodon, which is definitely extinct, a few weeks ago. www.southernfriedscience.com/fun-facts-an...
southernfriedscience.com
Fun facts and FAQs about Megalodon, Maryland’s new (and definitely extinct) official state shark
This week, Maryland became the first U.S. State to have an official state shark! Otodus megalodon was a really cool shark that is rightfully beloved by many, and Maryland’s Calvert Cliffs are…
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wombatarama.bsky.social @wombatarama.bsky.social · 22h
the best are the ones where you can't reach them from outside the shower so you have to stand in the ice cold/scalding hot water figuring out how to adjust it
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David Shiffman, Ph.D. 🦈 @whysharksmatter.bsky.social · 22h
Do hotels have, like, secret competitions to see who can come up with the least intuitive shower controls?
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David Shiffman, Ph.D. 🦈 @whysharksmatter.bsky.social · 22h
I love reality tv and traitors is bad. In “the mole,” there’s someone secretly working against the group, but it’s possible to figure out who they are based on actions they take. In “traitors,” the person secretly working against the group doesn’t do anything differently from the group. Silly!
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LCV – League of Conservation Voters 🌎 @lcv.org · 22h
List of things Trump has now called a "hoax": ❌ Climate change ❌ Criticism of his COVID inaction ❌ Anger about AI and data centers ❌ His handling of the Epstein Files
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Patricia Zengerle @reuterszengerle.bsky.social · 23h
Bipartisan members of Congress move to block demolition of Kennedy Center - www.reuters.com/legal/govern...
reuters.com
Bipartisan members of Congress move to block demolition of Kennedy Center
When President Donald Trump took a wrecking ball to the East Wing of the White House, it took Washington by ​surprise. Now, there is a move in the US Congress to avoid a second such surprise with legi...
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Andrew D Thaler @drandrewthaler.bsky.social · 02/10/2026
On a more serious note, the (still slow) recovery of marine mammal populations thanks to the end of large scale industrial whaling means that we will have more frequent encounters with large whales. That's generally a good thing. Sometimes... not so good.
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Cedar Riener @criener.bsky.social · 02/10/2026
Great great talk combining science of sharks, environmental politics, science communication. I especially appreciated the clear-eyed truth telling on present challenges and harms leading into optimistic plans and specific policy recs & individual actions.
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The Open Notebook @theopennotebook.bsky.social · 02/10/2026
How do you use our Science Reporting Navigator? We know no two journalists or reporting situations are the same, so the Navigator offers flexibility to find what works for you. Explore it now: www.theopennotebook.com/science-repo...
theopennotebook.com
Science Reporting Navigator - The Open Notebook
Bring Scientific Evidence into Any Beat Every story is a science story. From education and public health to transportation and local policy, science intersects with every beat journalists cover. The…
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David Shiffman, Ph.D. 🦈 @whysharksmatter.bsky.social · 01/10/2026
Ready for my talk at Randolph-Macon, my 95th #WhySharksMatter book talk! Want me to come speak at your institution? I’ll go anywhere with a speaker travel budget and an audience. Let’s chat!
Standing under my title slide
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Emily Yeager, PhD @emilyyeager9.bsky.social · 02/09/2026
Check out our latest coral publication!! Congrats @ambonacolta.bsky.social !
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David Shiffman, Ph.D. 🦈 @whysharksmatter.bsky.social · 01/10/2026
US datacenter discharged large amounts of pollution for almost a year with no permits
theguardian.com
US datacenter discharged large amounts of pollution for almost a year with no permits
Records show Vineland facility in New Jersey emitted health-harming pollution before regulators stepped in
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